I recently stumbled upon the use of this CSS element in some older code and document it here for future reference.
- Gecko 1.9.1 (Firefox 3.5 – final release of June 30, 2009) and later do not support
-moz-opacity. By now, you should be using simply
- Prior to version 9, Internet Explorer does not support
opacity, rather it supports
- IE supports also the extended form
- IE8 introduced
-ms-filter, which is synonymous with
- Similar to
-khtml-opacityhas been dead since early 2004 (release of Safari 1.2).
Konqueror never had support for
-khtml-opacityand had been supporting
opacitysince version 4.0.